NXP (formerly Philips) LPC214X series of ARM on the escalation of USB in the system source code, highly recommended!! Developer Home: http://www.simonqian.com/en/LPCUSBBoot/

lpcusbboot
..........\CHANGELOG
..........\changelog.txt
..........\Doxyfile
..........\examples
..........\........\console.c
..........\........\console.h
..........\........\crt.s
..........\........\iap.c
..........\........\iap.h
..........\........\lpc2148-ram.ld
..........\........\lpc2148-rom-boot.ld
..........\........\lpc2148-rom.ld
..........\........\lpcisp.h
..........\........\main_lpcusbboot.c
..........\........\Makefile
..........\........\printf.c
..........\........\serial_fifo.c
..........\........\serial_fifo.h
..........\........\startup.c
..........\........\startup.h
..........\........\usbser.inf
..........\........\uu_codec.h
..........\license.txt
..........\Makefile
..........\readme.txt
..........\type.h
..........\usbapi.h
..........\usbcontrol.c
..........\usbdebug.h
..........\usbhw_lpc.c
..........\usbhw_lpc.h
..........\usbinit.c
..........\usbstdreq.c
..........\usbstruct.h

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